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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-taasde.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-taasde.ads | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-taasde.ads b/gcc-4.2.1/gcc/ada/s-taasde.ads deleted file mode 100644 index 4eecabff5..000000000 --- a/gcc-4.2.1/gcc/ada/s-taasde.ads +++ /dev/null @@ -1,151 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . T A S K I N G . A S Y N C _ D E L A Y S -- --- -- --- S p e c -- --- -- --- Copyright (C) 1998-2006, Free Software Foundation, Inc. -- --- -- --- GNARL is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- --- sion. GNARL is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNARL; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNARL was developed by the GNARL team at Florida State University. -- --- Extensive contributions were provided by Ada Core Technologies, Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package contains the procedures to implements timeouts (delays) for --- asynchronous select statements. - --- Note: the compiler generates direct calls to this interface, via Rtsfind. --- Any changes to this interface may require corresponding compiler changes. - -package System.Tasking.Async_Delays is - - -- Suppose the following source code is given: - - -- select delay When; - -- ...continuation for timeout case... - -- then abort - -- ...abortable part... - -- end select; - - -- The compiler should expand this to the following: - - -- declare - -- DB : aliased Delay_Block; - -- begin - -- if System.Tasking.Async_Delays.Enqueue_Duration - -- (When, DB'Unchecked_Access) - -- then - -- begin - -- A101b : declare - -- procedure _clean is - -- begin - -- System.Tasking.Async_Delays.Cancel_Async_Delay - -- (DB'Unchecked_Access); - -- return; - -- end _clean; - -- begin - -- abort_undefer.all; - -- ...abortable part... - -- exception - -- when all others => - -- declare - -- E105b : exception_occurrence; - -- begin - -- save_occurrence (E105b, get_current_excep.all.all); - -- _clean; - -- reraise_occurrence_no_defer (E105b); - -- end; - -- at end - -- _clean; - -- end A101b; - -- exception - -- when _abort_signal => - -- abort_undefer.all; - -- end; - -- end if; - -- - -- if Timed_Out (DB'Unchecked_Access) then - -- ...continuation for timeout case... - -- end if; - -- end; - - ----------------- - -- Delay_Block -- - ----------------- - - type Delay_Block is limited private; - type Delay_Block_Access is access all Delay_Block; - - function Enqueue_Duration - (T : Duration; - D : Delay_Block_Access) return Boolean; - -- Enqueue the specified relative delay. Returns True if the delay has - -- been enqueued, False if it has already expired. If the delay has been - -- enqueued, abort is deferred. - - procedure Cancel_Async_Delay (D : Delay_Block_Access); - -- Cancel the specified asynchronous delay - - function Timed_Out (D : Delay_Block_Access) return Boolean; - pragma Inline (Timed_Out); - -- Return True if the delay specified in D has timed out - - -- There are child units for delays on Ada.Calendar.Time and - -- Ada.Real_Time.Time, so that an application will not need to link in - -- features that is not using. - -private - - type Delay_Block is record - Self_Id : Task_Id; - -- ID of the calling task - - Level : ATC_Level_Base; - -- Normally Level is the ATC nesting level of the - -- async. select statement to which this delay belongs, but - -- after a call has been dequeued we set it to - -- ATC_Level_Infinity so that the Cancel operation can - -- detect repeated calls, and act idempotently. - - Resume_Time : Duration; - -- The absolute wake up time, represented as Duration - - Timed_Out : Boolean := False; - -- Set to true if the delay has timed out - - Succ, Pred : Delay_Block_Access; - -- A double linked list - end record; - - -- The above "overlaying" of Self_ID and Level to hold other - -- data that has a non-overlapping lifetime is an unabashed - -- hack to save memory. - - procedure Time_Enqueue - (T : Duration; - D : Delay_Block_Access); - pragma Inline (Time_Enqueue); - -- Used by the child units to enqueue delays on the timer queue - -- implemented in the body of this package. - -end System.Tasking.Async_Delays; |